Fig. 5: Final state assignment using combination differences.

Simplified illustration of the observed combination differences used to assign the final states of probe transitions. The solid, dashed, and dotted lines illustrate the transitions corresponding to the case when the P(2, F₂), Q(2, F₂), and R(2, F₂) transitions in the ν₃ band are pumped, respectively. Transitions reaching final states with J = 0 and 1 are out of the measured probe range in this work and are not shown.